Home / 20,771.72-28,664.61-11,819.04

Finding the Fourth Proportional to 20,771.72, 28,664.61 and 11,819.04

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Solution

The fourth proportional to 20,771.72, 28,664.61 and 11,819.04 is: 16,310.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,771.72 : 28,664.61 = 11,819.04 : x
  2. Step 2: Convert to fraction form
    20,771.72/28,664.61 = 11,819.04/x
  3. Step 3: Cross multiply
    20,771.72x = 28,664.61 × 11,819.04
  4. Step 4: Simplify right side
    20,771.72x = 338,788,172.17
  5. Step 5: Solve for x
    x = 338,788,172.17/20,771.72
  6. Step 6: Final answer
    x = 16,310.07

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.